<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <!-- 添加角色按钮 -->
        <el-col :span="2">
          <el-button type="primary" @click="addRolesVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <el-table :data="roleList">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >
                      {{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{ scope.row }}</pre> -->
          </template>
        </el-table-column>
        <!-- 索隐列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRolesById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addRolesVisible"
      width="50%"
      @close="addRolesClosed"
    >
      <el-form :model="addRolesForm" ref="addRolesFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      roleList: [],
      addRolesForm: {
        roleName: '',
        roleDesc: '',
      },
      addRolesVisible: false,
      setRightDialogVisible: false,
      rightsList: [],
      //   树形控件属性绑定
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      //   默认选中的节点ID值
      defKeys: [],
      //   当前即将分配权限的角色id
      roleId: '',
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      //   console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.roleList = res.data
      //   console.log(this.roleList)
    },
    removeRolesById(id) {
      //   console.log(id)
      this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      })
        .then(() => {
          this.$http.delete('roles/' + id).then((res) => {
            console.log(res)
            if (res.data.meta.status != 200)
              return this.$message(res.data.meta.msg)
            this.$message(res.data.meta.msg)
            this.getRolesList()
          })
        })
        .catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除',
          })
        })
    },
    addRolesClosed() {
      this.$refs.addRolesFormRef.resetFields()
    },
    async addRoles() {
      const { data: res } = await this.$http.post('roles', this.addRolesForm)
      //   console.log(res)
      if (res.meta.status !== 201) return this.$message.error(res.meta.msg)
      this.addRolesVisible = false
      this.getRolesList()
      this.$message.success(res.meta.msg)
    },
    // 根据id删除对应权限
    removeRightById(role, rightId) {
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(
            `roles/${role.id}/rights/${rightId}`
          )
          console.log(res)
          if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
          this.$message.success('删除成功')
          role.children = res.data
          //   this.$http
          //     .delete(`roles/${role.id}/rights/${rightId}`)
          //     .then((res) => {
          //       console.log(res)
          //       console.log(res.data)
          //       if (res.status !== 200) return this.$message.error(res.meta.msg)
          //       this.$message.success('删除成功')
          //       role.children = res.data.data
          //     })
        })
        .catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除',
          })
        })
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      // 获取所有权限的数据
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      console.log(this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKey数组中
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => {
        this.getLeafKeys(item, arr)
      })
    },
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr,
        }
      )
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.$message.success(res.meta.msg)
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
}
</script>
<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>